Canon ImageRunner iR8500 Series Service Manual

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Contents

Chapter 1717-105T-17-123SHDG-POS Use it to enter data for changing the position of measurement on the standard white plateused for shading correction.1216 to 296 (a multiple of 8 causes a shift of about 0.189 mm)- If dirt is found on the copyboard glass, execute this mode to avoid the area when readingthe standard white plate.- You must execute the following if you have changed the setting:COPIER>FUNCTION>CCD>SH-PS-ST.SH-PS-ST Use it to execute optimum position auto adjustment for the standard white plate forshading correction.1- You must execute COPIER>FUNCTION>CCD>CCD-ADJ before executing thismove.- Execute this mode if you have replaced the copyboard glass (standard white plate) or awhite line is noted in halftone areas.Using the Mode1)Clean the back of the copyboard glass.2)Open the ADF (copyboard cover).3)Select to highlight, and press the OK key.4)The machine executes automatic adjustment (about 10 sec).5)When done, the machine stops automatically indicating the result (OK/NG).- If 'NG' is indicated, perform the following, and execute the mode once again:a.Is the ADF (copyboard cover) open?b.Is the copyboard glass mounted correctly?c.Is the standard white plate (attached to the copyboard glass) normal?d.Does the scanning lamp go ON?6)The items under COPIER>ADJUST>ADJ-XY and ADJ-S are updated. Record the newsettings on the service label.EGGN-POS Use it to execute auto adjustment for the edge gain correction position for the CCD. (TheCCD edge gain correction mechanism is effective only when an ADF is in use.)1- If the CCD unit has been replaced, be sure to execute the following in advance:COPIER>FUNCTION>CCD>CCD-ADJ.- If the CCD unit, No. 1 mirror mount, or No. 2 mirror mount has been replaced, executethis mode.Using the Mode1)Open the ADF (copyboard cover; be sure to do so).2)Select the item, and press the OK key.3)Wait until auto adjustment ends (about 1 sec).4)See that auto adjustment ends automatically and the results (OK/NG) are displayed.- If NG is indicated, check the following, and execute adjustment oncea.Is the ADF (copyboard cover) open?b.Is the reading glass mounted correctly?c.Is the edge gain correcting plate attached to the reading glass normal?d.Is the scanning lamp on?5)When the following has been updated, enter the new settings:COPIER>ADJUST>CCD-EGGN-ST and -EGGN-END.COPIER > FUNCTION > LASERSub-item Description LevelPOWER-A Use it to turn on the laser A.11) Select to highlight, and press the OK key.2) See that the laser goes ON, and the display indicates 'Start -> ACTIVE' (flashing);the upper right of the screen indicates .3) See that the message goes OFF automatically in about 60 sec, and the displayindicates 'OK!'.POWER-B Use it to turn on the laser B.11) See the instructions under POWER-A.COPIER > FUNCTION > CCDSub-item Description Level